Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 11,039	$ 9,405	$ 22,423	$ 20,281
Other comprehensive income (loss):
Available-for-sale securities, Pre-tax	(12)	41	(20)	15
Available-for-sale securities, Tax	3	(11)	5	(4)
Available-for-sale securities, Net of Tax	(9)	30	(15)	11
Postemployment severance actuarial change, Pre-tax	296	158	445	238
Postemployment severance actuarial change, Tax	(76)	(41)	(115)	(61)
Postemployment severance actuarial change, Net of Tax	220	117	330	177
Derivative gain (loss), Pre-tax	0	(2)	0	(11)
Derivative gain (loss), Tax	0	0	0	2
Derivative gain (loss), Net of Tax	0	(2)	0	(9)
Reclassification to (earnings) loss:
Amortization of actuarial change, Pre-tax	(90)	(103)	(178)	(202)
Amortization of actuarial change, Tax	23	27	46	52
Amortization of actuarial change, Net of Tax	(67)	(76)	(132)	(150)
Derivatives, Pre-tax	0	5	0	21
Derivatives, Tax	0	(1)	0	(5)
Derivatives, Net of Tax	0	4	0	16
Other comprehensive income (loss), Pre-tax	194	99	247	61
Other comprehensive income (loss), Tax	(50)	(26)	(64)	(16)
Other comprehensive income (loss), Net of Tax	144	73	183	45
Total comprehensive income	$ 11,183	$ 9,478	$ 22,606	$ 20,326